Don Lee 6 Posted November 18, 2014 Share Posted November 18, 2014 Hello, Is it just me? Every time I land A321 it always bounces a little bit when the main gear touches down. I have done 10 touch&go's today to test and all the landings bounced, I thought it was caused by my poor skill set so I decided to perform an ILS auto land with clear weather set and saw it bounced too. My landings have never exceeded 300fpm according to the acars system of my VA, some are even below 100. Is it normal with the Airbus? I have not tested with A320 yet. Thanks, Don Link to comment Share on other sites More sharing options...
Aerosoft Aerosoft Team [Inactive Account] 51558 Posted November 19, 2014 Aerosoft Share Posted November 19, 2014 I am not sure how unrealistic that is. We could increase the damping but that makes the aircraft less 'lively' on the ground and in fax it is already a bit boring.... Link to comment Share on other sites More sharing options...
Don Lee 6 Posted November 19, 2014 Author Share Posted November 19, 2014 I don't really understand what you said above. This issue is really annoying, it also causes the autobrake to not work. At the first touch down, the autobrake deploys correctly, but after the bounce the autobrake doesn't work anymore, and I always have to use manual brake to calm the bus down so most of the times I get it hot. Link to comment Share on other sites More sharing options...
Cheyenne Chief Pilot 829 Posted November 19, 2014 Share Posted November 19, 2014 In an autoland in clear weather, a bounce and the disengagement of the autobrakes is not expected. Can you confirm, the thrust levers auto-retard during the autoland, and remain in idle? Link to comment Share on other sites More sharing options...
Don Lee 6 Posted November 19, 2014 Author Share Posted November 19, 2014 For the autoland, I idled thrust myself when the retard callout came up and added full thrust reverse after nose gear touched down. Autobrake does work sometimes, just to correct. I've tried with all the options, Low, Mid, and Max. Thanks! Link to comment Share on other sites More sharing options...
Deputy Sheriffs The Dude 6537 Posted November 19, 2014 Deputy Sheriffs Share Posted November 19, 2014 Did MAX really work? Link to comment Share on other sites More sharing options...
Cheyenne Chief Pilot 829 Posted November 20, 2014 Share Posted November 20, 2014 Can be (re-)engaged after touchdown. Link to comment Share on other sites More sharing options...
Don Lee 6 Posted November 20, 2014 Author Share Posted November 20, 2014 I tried with Max and it didn't work either, but I may try again and record a video for you to see. Reengaging autobrake after touchdown doesn't sound a good idea at all, as you know we are really busy that time. Link to comment Share on other sites More sharing options...
Cheyenne Chief Pilot 829 Posted November 20, 2014 Share Posted November 20, 2014 That was in response to Frank's question. MAX is for takeoffs only (like the RTO setting in Boeings). You can't engage it in the air in our models, but it can be engaged when on the ground, or back on the ground after a landing. Neither SOP nor recommended for landings, though. Link to comment Share on other sites More sharing options...
Don Lee 6 Posted November 20, 2014 Author Share Posted November 20, 2014 I know that, I often use Low for a dry long runway, and Mid for short or wet runway, tried max as I wanted to test. I've noticed that "Brake" message appears right away when main landing gear touches down then the whole aircraft jumps off runway a little bit, "Brake" disappears, then the main gear touches again smoothly upon the touch down of nose gear and you won't have autobrake anymore. I think autobrake should only commence to work when you have both main and nose gears down on the ground. Link to comment Share on other sites More sharing options...
Deputy Sheriffs The Dude 6537 Posted November 20, 2014 Deputy Sheriffs Share Posted November 20, 2014 I think autobrake should only commence to work when you have both main and nose gears down on the ground. Sorry , that is not how it works in RL and therefor it also does not work like that in the sim. I think the main problem was the bounce here. Could we stick to that. How many other users have this problem? I for one do not see this in the sim. Link to comment Share on other sites More sharing options...
Don Lee 6 Posted November 20, 2014 Author Share Posted November 20, 2014 I will check with some sim fellows to see if they have this problem too. Link to comment Share on other sites More sharing options...
Aerosoft Aerosoft Team [Inactive Account] 51558 Posted November 22, 2014 Aerosoft Share Posted November 22, 2014 We have not been able to find any noticeable bouncing on landing on our test machines. It could be related to low frame-rates. Link to comment Share on other sites More sharing options...
Don Lee 6 Posted November 22, 2014 Author Share Posted November 22, 2014 I don't think it's a problem with low frame rates because my computer is decent, fps is locked at 30, never down lower than 25 in any conditions of weather or scenery with display settings maxed out. My specs: FSX with Windows 7 Ultimate 64 bit CPU: Intel Core i7 - 3.7Ghz RAM: 16Gb 1600MHz GPU: NVIDIA GeForce GT 750M with 2GB GDDR5 memory Storage: 512Gb SSD Addons: GSX, Ezdok, ASN. Link to comment Share on other sites More sharing options...
Don Lee 6 Posted November 23, 2014 Author Share Posted November 23, 2014 I just recorded a landing with A321 which was a ILS CAT III autoland, please see the video and notice the bouncing, and also the "Brake" message at the corner, it appeared then disappeared then never appeared again although I used "MID" autobrake, ended up I had to manual brake at the end of the runway to stop the aircraft, I didn't touch anything on mouse, keyboard, joystick during the landing except of moving idle the thrusts on my throttle quadrant and set reverse. Also funny that it landed on the right side of the runway (18C EHAM), but I don't really care about this issue as it could be something wrong with the scenery maybe, and I don't rely on autoland. Again, the bouncing always happens but autobrake sometimes works. Thanks, Don 2014-11-22-1757-37.mp4 Link to comment Share on other sites More sharing options...
Deputy Sheriffs The Dude 6537 Posted November 23, 2014 Deputy Sheriffs Share Posted November 23, 2014 Thanks for the video. That makes things a bit easier for us. In the RW a bounch is something different so I was thinking along the wrong lines with your problem. At main gear touchdown you still have the AB MED armed, which is good. Afer that it goes wrong as you already stated. Could you please make another video where we can also see the lower ECAM display and the AutoBrake panel? Thanks Link to comment Share on other sites More sharing options...
Don Lee 6 Posted November 23, 2014 Author Share Posted November 23, 2014 I already stated that it only bounces a little bit, not too much for everyone to realize with smooth landings, it's more for hard landings. Maybe if I land with config 3, the bounce will be more visible. Yes sure I will try to make another test with lower ECAM view and post here a vid for you to see how it works. Thanks. Link to comment Share on other sites More sharing options...
Don Lee 6 Posted November 23, 2014 Author Share Posted November 23, 2014 I've exceeded my quota to attach more videos so had to upload this one to youbute (unlisted). The bouncing issue is more visible this time, you will obviously see that the main gear touched down twice. I did 2 test landings today, at the first time, autobrake worked, the second time it did not. Replay spot view is at the end of the video, notice how oddly the main gear acted. Link to comment Share on other sites More sharing options...
Max Reverse 344 Posted November 23, 2014 Share Posted November 23, 2014 Hello Don, thank you for your videos. The good news, its not the bouncing everybody thought it is. It looks more like a failure in the Main Gear suspension. Could it be, that there are two scenerys laying at this airport? For me, In your video, the Main gear gets compressed from a object, hole or something on the runway. Link to comment Share on other sites More sharing options...
Blue 0 Posted November 23, 2014 Share Posted November 23, 2014 hi, Just to confirm this. It's happend the same thing for me with A321 IAE and CFM but not with A320. Regards, Christian Link to comment Share on other sites More sharing options...
Don Lee 6 Posted November 23, 2014 Author Share Posted November 23, 2014 It happens all the time for me in various airports. The landing in above video was made on runway 07R EDDF (Aerosoft Mega Airport Frankfurt). Link to comment Share on other sites More sharing options...
Yolo Swaggins 15 Posted November 23, 2014 Share Posted November 23, 2014 I have the same issue with 320 and 321, but i don't see any "bouncing", so it probably isn't related. Link to comment Share on other sites More sharing options...
Deputy Sheriffs The Dude 6537 Posted November 23, 2014 Deputy Sheriffs Share Posted November 23, 2014 Could you try an approach without EZCA? I have just flown 3 autolands with the same plane and all went fine. Link to comment Share on other sites More sharing options...
Yolo Swaggins 15 Posted November 24, 2014 Share Posted November 24, 2014 I reinstalled the bus and the problem is gone now Link to comment Share on other sites More sharing options...
Don Lee 6 Posted November 24, 2014 Author Share Posted November 24, 2014 I reinstalled the bus and the problem is gone now What was your problem actually? Link to comment Share on other sites More sharing options...
Recommended Posts
Archived
This topic is now archived and is closed to further replies.